Program error

[zane]

The software platform is matlab r2016.
Running files：demo_two_layer_neuralnet。
The following error prompt appears：
{
Incorrect use +
The matrix dimensions must be consistent.
Error affine/forward (line 53)
             Out = obj.x * obj.W + obj.b;

Error two_layer_net/predict (line 152)
                 x = obj.layer_manager.layers{idx}.forward(x);

Error two_layer_net/loss_partial (line 141)
             y = obj.predict(x_curr_batch);

Error two_layer_net/loss (line 125)
             f = loss_partial(obj, 1:obj.samples);

Error nn_trainer/train (line 162)
             Loss = obj.network.loss();

Error demo_two_layer_neuralnet (line 27)
Info = trainer.train();
}